SunPower the Most Efficient Solar

“Meanwhile, SunPower makes the most efficient silicon panels on the market with 19.3 percent efficiency, according to Photon’s annual module overview, which came out in February. (Some efficiency is always lost when companies combine cells into panels.) In May, the company announced a new line of panels rated for up to 19.5 percent efficiency, and in June, SunPower announced it had set a new world record for large-area silicon solar cells with a conversion efficiency of 24.2 percent measured by the National Renewable Energy Laboratory.”